Surgeon&#39;s knife



N. SEAHOLM SURGEONS KNIFE Filed Oct. 26, 1926 .m AH. W 0

G T F 1 I Patented Apr. 15, 1930 UNITED STATES PATENT OFFICE This invention relates to detachable blade knives used in surgery, and particularly to the class wherein a handle is rovided with a pair of slotted op osite pro ections and a blade having a suita le shank which may be caused to en age said handle projections so as to be assem led with the handle to form the com lete knife.

T e prima object of my inventlon is to provide a kni e which has a detachable blade which ma be shaigiened or exchanged, and which is esigned or strength of form.

Another ob ect is to provide a knife of the character mentioned with a unitary handle which has no moving parts, and whichis provided with guards and reinforcements for a blade which may be secured thereto.

A further object is to make a knife and a separable blade which are both exceedingly Sim 1e and economical to manufacture.'

urther objects and the inherent advantages of my invention will be disclosed as the'specification proceeds.

In the accompanying drawing forming part of this specification Fig. 1 is a perspective vlew of,a surgeons knife made according to my invention and embodying thesame. a I Fig. 2 is a similar view with the blade n 9 an intermediate position'on the handle n partial assembly therewith, as it; appearsv when being removed or-be ng attached'. Fig. 3 is a similar view of the handle mamber of my invention,-

I Fig.4 is-another viewxfof the same part.

Fig. 5 is a view of the blade member of .the invention. 1 w L Throughout the views the same reference characters indicate the. same parts. In tlrepractice of my invention, a handle 1 is provided with a lade' seat section 17 and on the edges ofthe latter, a pair of opposite guards or blade grips 2 and 3. The

blade grips 2 and 3 are provided with under-' cut slots at 14 and 15, respectively, which extend only part way along their facing sides.

The forward portion ofthe blade seat terminates in a point at 16, while between the 9 seat and the handle proper, a pair of similar indentations 4 and 5 reduce the cross section of the member.

A blade 10, desi ed to 00-0 crate with and be borne by the andle, also orms a part of my invention and is provided with a narrow shank 11 adapted to fit snugly between Ellie blade grips or guards 2 and 3 on the han- This shank terminates at the rear in a pair of lateral side tongues or shoulders 6 and 7 which are adapted to engage the rear extremities of the guards 2 and 3 to revent the blades from sllpping forward on,t e handie when once set 111 place. And in order to prevent rearward movement of the blade,

the same is further provided. with a pair of stop shoulders 8 and 9 adapted to engage the forward extremities of guards 2 an 3.

However, in order to hold the blade down upon its seat, so that the other locating means become effective, the blade is also provided with a pair of shoulders at 12 and 13 which are adapted to engage the slots 14 and 15 in guards 2 and 3, respectively.

Whenit is desired to assemble the knife, the blade is laid upon point 16 and while tongues 6, and 7 are resting on guards 2 and 3,-it is bent slightly by placing a finger upon the shank so that shoulders 12 and 13 mayenter slots 14 and 15. The blade is then drawn upon the handle until shoulders 8 and 9 are stopped by the guards, when the tongues 6 an will snap down beyond the guards, owing to the tendency of the blade to straighten out. The rear part of the guards may be inclined as at 18 to make a tight fit.

-On thes other hand, w lien it is desired to remove the blade, it is but necessary to grip and liftthe tongues or shoulders 6 and 7 with two fingers until the will clear the guards and then push the b ade forward. I The indentations 4 and 5 are provided as a convenience to render the blade tongues more accessible. The tongues or shoulders which actually serve as finger pieces will slide along the-tops of the'guards until the shoulders 12 and 13 cleartheirv retaining slots 14 and 15, when the blade will. spring clear of the lOO . normally engaging Having now fully described my invention, 7

borough of Manhattan, city and State of New York,

I claim 1. A'surgeo'ns knife including the combinationxwith a handle having a blade seat proiecting forwardly therefrom, there being a relatively narrow section between the handle pro r and the blade seat, of a air of opocating an retaining said blade and ablade for mounting between said guards on said seat having a pair of diverging and aligned tongues at the inner extremity of said blade the inner extremities of said guard and projecting outward between the blade seat and the handle to serve as finger ieces whereby to raise the inner end of said blade so as to permit said finger pieces to slide upon their respective guards and thereby release said blade from said seat and handle.

2. The combination of an imperforate knife blade terminating rearwardly in a pair of opposite diverging stop shoulders, a relatively reduced shank extending rearward from said shoulders and a distinct pair of opposite diverging tongues disposed upon the rear of said shank to sex ve as a pair of finger pieces whereby to bodily grip and manipulate said blade as a whole, there being a handle having means to engage between said stop shoulders and said finger pieces and intermediately to locate and retain said shank in order to retain said blade upon said handle.

3. The combination of a blade having a pair of corresponding sto shoulders, a main shank extending rearwar 1y from said shoulders and terminating in a second pair of corresponding shoulders, a reduced shank extending rearwardly beyond said second pair of shoulders, and a pair of opposite diverging terminal ton es disposed on said reduced shank in order to serve as finger pieces whereby to gri said blades as a whole for manipulation oi the same, there being a handle'having means to retain said main shank and engaging against said stop shoulders and said terminal tongues, and also engaging the sides of said reduced shank, whereby to locate said blade upon said handle.

4. A surgeons knife including the combination with a blade having a shank provided with a pluralityof shoulders thereon, of a handle having a forwardly projecting blade seat for receiving said shank including a pair of opposite corresponding guards having generally uniform inner edges and un-.

rdercut sections beneath said inner guard edges extending inwardly along said guards from the forward extremities thereof, said undercut sections terminating intermediate the extremities of said guards and serving to retain said shank normally on said seat and thereby hold said blade in assembled relation to said handle.

itely disposed guards on said b ade seatfor Signed Oct., 1926.

NQILS SEAHOLM. 

